feat: generate APIs from swagger

[rhajek]

Proposed Changes

This PR contains generated APIs from swagger using influxdb-clients-apigen generator.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• make test completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #44 into master will decrease coverage by 3.80%.
The diff coverage is 47.05%.

@@             Coverage Diff              @@
##             master      #44      +/-   ##
============================================
- Coverage     86.31%   82.50%   -3.81%     
- Complexity      294      346      +52     
============================================
  Files            16       18       +2     
  Lines           665      789     +124     
============================================
+ Hits            574      651      +77     
- Misses           91      138      +47     

Impacted Files	Coverage Δ	Complexity Δ
src/InfluxDB2/ObjectSerializer.php	54.96% <ø> (+14.46%)	64.00 <0.00> (+3.00)
src/InfluxDB2/Configuration.php	28.94% <28.94%> (ø)	31.00 <31.00> (?)
src/InfluxDB2/HeaderSelector.php	69.56% <69.56%> (ø)	13.00 <13.00> (?)
src/InfluxDB2/Client.php	93.10% <86.66%> (-6.90%)	11.00 <5.00> (+5.00)	⬇️
src/InfluxDB2/ApiException.php	83.33% <100.00%> (+16.66%)	5.00 <1.00> (ø)
src/InfluxDB2/DefaultApi.php	81.63% <100.00%> (+2.04%)	14.00 <0.00> (ø)

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[bednar]

Please

• add an example how to use management api (query buckets) to the Advanced Usage section in README.md
• rebase sources and update CHANGELOG.md